# TransFlow vs Doc Translator

The clearest difference is update cadence: Doc Translator at every 5 days against TransFlow's every 17 months. Doc Translator also leads on iOS requirement (18.0 vs 26.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. TransFlow sells 1 one-off in-app purchase and Doc Translator sells 4 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

TransFlow ships an update every 17 months, Doc Translator every 5 days. The most recent releases landed on November 8, 2026 and October 29, 2026 respectively.

## The numbers

| Metric | TransFlow | Doc Translator |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 17 months | **Every 5 days** |
| Monetization | Free with in-app purchases | — |
| Size | 11 MB | 18 MB |
| Requires iOS | 26.0 | **18.0** |
| Devices | **iPhone, iPad, Mac** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [实 许](https://appshunter.io/developer/681075194) | [炜桢 吕](https://appshunter.io/developer/1597907877) |

## What reviewers say

### TransFlow

[App page](https://appshunter.io/ios/app/transflow-epub-translator/id6475327487)

Translate foreign language EPUB books into your preferred language using on-device translation. Read translated books with customizable themes and export them to your favorite EPUB readers. Offers both translation-only and bilingual output options.

**Highlights:** On-device EPUB translation, Bilingual output option, Customizable reader themes, Queue multiple books for translation, Export translated EPUBs, Pause and resume translation

**Features:** Vision Pro support, iPhone Duo support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| TransFlow Pro | $9.99 | one-time |


### Doc Translator

[App page](https://appshunter.io/ios/app/doc-translator-pdf-epub-ocr/id6810911331)

**Features:** iPhone Duo support

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 100 Credits | $2.99 | one-time |
| 300 Credits | $7.99 | one-time |
| 1000 Credits | $24.99 | one-time |
| 3000 Credits | $69.99 | one-time |


## Frequently asked questions

### Is TransFlow free?

TransFlow is free to download, with in-app purchases available.

### Is Doc Translator free?

Doc Translator is free to download, with in-app purchases available.

### Do TransFlow or Doc Translator have ads?

Neither TransFlow nor Doc Translator shows ads.

### Which is updated more often, TransFlow or Doc Translator?

TransFlow ships an update every 17 months, and Doc Translator every 5 days. Most recently, TransFlow was updated on November 8, 2026 and Doc Translator on October 29, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*